Process of making copper alloys and the product thereof.



f UNITED STATES PATENT OFFICE.

JAMES NAULTY AND LIOHN SCANIIIN, 0F PHILADELPHIA, PENNSYLVANIA.

PROCESS OF MAKING COPPER ALLOYS AND THE PRODUCT THEREOF.

No Drawing.

To all whom 'it may concern:

Be it known that we, JAMES NAULTY and JOHN SOANLIN, citizens of theUnited States, residing in the city of Philadelphia, Stateof'Pennsylvania, have jointly invented certain new and usefulImprovements in Processes of Making Copper Alloys and the ProductsThereof, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

Our invention relates to a process of making chromium alloys of copper,compounded with nickel and other metals, and to the new compositionmetal which is the product thereof, and has for its object to produce a,

copper alloy which is of great tensile strength and incidentally ofsuflicient hardness, approximately that of ordinary steel, to made edgedtools therefrom; and is Well adapted for rolling, welding and forgework.

To these ends the invention consists of a particular method ofcompounding the elements of the composition, and the product thereofwhich is. copper or its natural alloys combined with chromium andnickel, and with a relatively small proportion of aluminum and of zinc.The resultant composition is essentially a copper alloy in which thechromium element is melted with the copper in approximately the ratio offive parts by weight of the former to one hundred and ten parts byweight of the latter; also in which ap roximately twenty-five parts byweight, of nickel, to one hundred and ten parts of copper, are combinedin the crucile; these elements, in or about the proportions stated beingemployed with twentyfive parts by weight, 1n the aggregate, of

zinc and aluminum, as hereinafter stated.

In carryin out the process to produce the new alloy, rom the elementsand in the quantitative ratios stated, five pounds of chromium aremelted in a crucible with five ounds of aluminum of commerce, used as aux, and which, with, natural draft, "will occupy about ,one hour,whereupon one hundred and ten poundspf copper are added to the mass inthe crucible and melted, under a continued application of the same heatfor.

about thirty minutes; after which twenty- Specification of LettersPatent.

Application filed July 23, 1910.

Patented Nov. 1, 1910.

Serial No. 573,525.

| five pounds of nickel are placed in the crucible and which willcombine with the other elements, in a molten 'mass in about one hour;and finally twenty pounds of zinc are added, which melts almostinstantaneously, and is employed principally for bulk or body purposes.Although the ratio stated of chromium to copper and of nickel to copperare approximate only and may be slightly varied, the order stated inwhich the elements are admixed .in the crucible, and the employment ofaluminum as a flux, with the chromium, are essential; and finally itmust be understood that our new composition metal is essentially acopper alloy. It has a slightly reddish tinge, and tests of it, madefrom the formula above given, showed a tensile strength of 78950 pounds.In both these respects it differs materially from the composition metalof copper and chromium combined with nickel and zinc, described in U. S.Patent No. 959,156 granted to us May 24, 1910, in which the largeproportion of nickelgives predominating color and characteristic to thecomposition, with erhaps greater hardness than our present a1 oy, butwith decidedly less tensile strength, tests of it showing but 45000pounds approximately.

I-Iavin thus described our invention, we

claim as new and desire to secure by Letters Patent 1. The process ofcom oundin a chromium alloy of copper, com ined with nickel,

which consists in melting the chromium with aluminum as a flux, thenadding the copper, nickel and a suitable bulkin metal to the molten masssuccessively an in the order stated.

2. The product of the process described which is approximately a fiveper cent. chromium alloy of copper, combined with nickel in the ratio ofapproximately five parts by weight of said copper alloy to one part byweight of nickel.

3. The new product described which is approximately a fiveqper eent.chrom1um alloy'of copper fiuxed w1th aluminum, combined with nickel inthe ratio of approximately five parts by Wei ht of-said copper.

alloy to one part by weig t of nickel.

4. The new productqldescribed which iet approximately a five per cent.chromium aflixed our signatures this twenty-first day iglloy1 ofe(l)lpperkfiiixediwith alumlilnum, comof July A. D. 1910.

ine Wit nic e an zinc in t e ratio, in the aggregate, of approximatelyone hundred and twenty pounds of said copper alloy to forty-five pounds,in the aggregate, of Witnesses: nickel and zinc. A. M. BIDDLE,

In testimony whereof, We have hereunto. R. A. DUNLAP.

